mirror of https://gitee.com/openkylin/linux.git
477 lines
14 KiB
C
477 lines
14 KiB
C
/*******************************************************************************
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*
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* Module Name: rsio - IO and DMA resource descriptors
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*
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******************************************************************************/
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/*
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* Copyright (C) 2000 - 2005, R. Byron Moore
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include <acpi/acresrc.h>
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#define _COMPONENT ACPI_RESOURCES
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ACPI_MODULE_NAME("rsio")
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/*******************************************************************************
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*
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* FUNCTION: acpi_rs_io_resource
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*
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* PARAMETERS: byte_stream_buffer - Pointer to the resource input byte
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* stream
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* bytes_consumed - Pointer to where the number of bytes
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* consumed the byte_stream_buffer is
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* returned
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* output_buffer - Pointer to the return data buffer
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* structure_size - Pointer to where the number of bytes
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* in the return data struct is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Take the resource byte stream and fill out the appropriate
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* structure pointed to by the output_buffer. Return the
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* number of bytes consumed from the byte stream.
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*
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******************************************************************************/
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acpi_status
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acpi_rs_io_resource(u8 * byte_stream_buffer,
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acpi_size * bytes_consumed,
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u8 ** output_buffer, acpi_size * structure_size)
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{
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u8 *buffer = byte_stream_buffer;
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struct acpi_resource *output_struct = (void *)*output_buffer;
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u16 temp16 = 0;
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u8 temp8 = 0;
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acpi_size struct_size = ACPI_SIZEOF_RESOURCE(struct acpi_resource_io);
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ACPI_FUNCTION_TRACE("rs_io_resource");
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/* The number of bytes consumed are Constant */
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*bytes_consumed = 8;
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output_struct->id = ACPI_RSTYPE_IO;
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/* Check Decode */
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buffer += 1;
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temp8 = *buffer;
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output_struct->data.io.io_decode = temp8 & 0x01;
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/* Check min_base Address */
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buffer += 1;
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ACPI_MOVE_16_TO_16(&temp16, buffer);
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output_struct->data.io.min_base_address = temp16;
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/* Check max_base Address */
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buffer += 2;
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ACPI_MOVE_16_TO_16(&temp16, buffer);
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output_struct->data.io.max_base_address = temp16;
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/* Check Base alignment */
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buffer += 2;
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temp8 = *buffer;
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output_struct->data.io.alignment = temp8;
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/* Check range_length */
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buffer += 1;
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temp8 = *buffer;
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output_struct->data.io.range_length = temp8;
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/* Set the Length parameter */
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output_struct->length = (u32) struct_size;
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/* Return the final size of the structure */
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*structure_size = struct_size;
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return_ACPI_STATUS(AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_rs_fixed_io_resource
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*
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* PARAMETERS: byte_stream_buffer - Pointer to the resource input byte
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* stream
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* bytes_consumed - Pointer to where the number of bytes
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* consumed the byte_stream_buffer is
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* returned
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* output_buffer - Pointer to the return data buffer
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* structure_size - Pointer to where the number of bytes
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* in the return data struct is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Take the resource byte stream and fill out the appropriate
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* structure pointed to by the output_buffer. Return the
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* number of bytes consumed from the byte stream.
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*
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******************************************************************************/
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acpi_status
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acpi_rs_fixed_io_resource(u8 * byte_stream_buffer,
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acpi_size * bytes_consumed,
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u8 ** output_buffer, acpi_size * structure_size)
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{
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u8 *buffer = byte_stream_buffer;
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struct acpi_resource *output_struct = (void *)*output_buffer;
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u16 temp16 = 0;
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u8 temp8 = 0;
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acpi_size struct_size =
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ACPI_SIZEOF_RESOURCE(struct acpi_resource_fixed_io);
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ACPI_FUNCTION_TRACE("rs_fixed_io_resource");
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/* The number of bytes consumed are Constant */
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*bytes_consumed = 4;
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output_struct->id = ACPI_RSTYPE_FIXED_IO;
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/* Check Range Base Address */
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buffer += 1;
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ACPI_MOVE_16_TO_16(&temp16, buffer);
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output_struct->data.fixed_io.base_address = temp16;
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/* Check range_length */
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buffer += 2;
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temp8 = *buffer;
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output_struct->data.fixed_io.range_length = temp8;
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/* Set the Length parameter */
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output_struct->length = (u32) struct_size;
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/* Return the final size of the structure */
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*structure_size = struct_size;
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return_ACPI_STATUS(AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_rs_io_stream
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*
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* PARAMETERS: linked_list - Pointer to the resource linked list
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* output_buffer - Pointer to the user's return buffer
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* bytes_consumed - Pointer to where the number of bytes
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* used in the output_buffer is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Take the linked list resource structure and fills in the
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* the appropriate bytes in a byte stream
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*
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******************************************************************************/
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acpi_status
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acpi_rs_io_stream(struct acpi_resource *linked_list,
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u8 ** output_buffer, acpi_size * bytes_consumed)
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{
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u8 *buffer = *output_buffer;
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u16 temp16 = 0;
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u8 temp8 = 0;
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ACPI_FUNCTION_TRACE("rs_io_stream");
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/* The descriptor field is static */
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*buffer = 0x47;
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buffer += 1;
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/* Io Information Byte */
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temp8 = (u8) (linked_list->data.io.io_decode & 0x01);
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*buffer = temp8;
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buffer += 1;
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/* Set the Range minimum base address */
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temp16 = (u16) linked_list->data.io.min_base_address;
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ACPI_MOVE_16_TO_16(buffer, &temp16);
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buffer += 2;
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/* Set the Range maximum base address */
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temp16 = (u16) linked_list->data.io.max_base_address;
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ACPI_MOVE_16_TO_16(buffer, &temp16);
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buffer += 2;
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/* Set the base alignment */
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temp8 = (u8) linked_list->data.io.alignment;
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*buffer = temp8;
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buffer += 1;
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/* Set the range length */
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temp8 = (u8) linked_list->data.io.range_length;
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*buffer = temp8;
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buffer += 1;
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/* Return the number of bytes consumed in this operation */
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*bytes_consumed = ACPI_PTR_DIFF(buffer, *output_buffer);
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return_ACPI_STATUS(AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_rs_fixed_io_stream
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*
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* PARAMETERS: linked_list - Pointer to the resource linked list
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* output_buffer - Pointer to the user's return buffer
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* bytes_consumed - Pointer to where the number of bytes
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* used in the output_buffer is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Take the linked list resource structure and fills in the
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* the appropriate bytes in a byte stream
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*
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******************************************************************************/
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acpi_status
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acpi_rs_fixed_io_stream(struct acpi_resource *linked_list,
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u8 ** output_buffer, acpi_size * bytes_consumed)
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{
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u8 *buffer = *output_buffer;
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u16 temp16 = 0;
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u8 temp8 = 0;
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ACPI_FUNCTION_TRACE("rs_fixed_io_stream");
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/* The descriptor field is static */
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*buffer = 0x4B;
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buffer += 1;
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/* Set the Range base address */
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temp16 = (u16) linked_list->data.fixed_io.base_address;
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ACPI_MOVE_16_TO_16(buffer, &temp16);
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buffer += 2;
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/* Set the range length */
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temp8 = (u8) linked_list->data.fixed_io.range_length;
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*buffer = temp8;
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buffer += 1;
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/* Return the number of bytes consumed in this operation */
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*bytes_consumed = ACPI_PTR_DIFF(buffer, *output_buffer);
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return_ACPI_STATUS(AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_rs_dma_resource
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*
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* PARAMETERS: byte_stream_buffer - Pointer to the resource input byte
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* stream
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* bytes_consumed - Pointer to where the number of bytes
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* consumed the byte_stream_buffer is
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* returned
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* output_buffer - Pointer to the return data buffer
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* structure_size - Pointer to where the number of bytes
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* in the return data struct is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Take the resource byte stream and fill out the appropriate
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* structure pointed to by the output_buffer. Return the
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* number of bytes consumed from the byte stream.
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*
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******************************************************************************/
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acpi_status
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acpi_rs_dma_resource(u8 * byte_stream_buffer,
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acpi_size * bytes_consumed,
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u8 ** output_buffer, acpi_size * structure_size)
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{
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u8 *buffer = byte_stream_buffer;
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struct acpi_resource *output_struct = (void *)*output_buffer;
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u8 temp8 = 0;
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u8 index;
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u8 i;
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acpi_size struct_size = ACPI_SIZEOF_RESOURCE(struct acpi_resource_dma);
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ACPI_FUNCTION_TRACE("rs_dma_resource");
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/* The number of bytes consumed are Constant */
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*bytes_consumed = 3;
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output_struct->id = ACPI_RSTYPE_DMA;
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/* Point to the 8-bits of Byte 1 */
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buffer += 1;
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temp8 = *buffer;
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/* Decode the DMA channel bits */
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for (i = 0, index = 0; index < 8; index++) {
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if ((temp8 >> index) & 0x01) {
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output_struct->data.dma.channels[i] = index;
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i++;
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}
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}
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/* Zero DMA channels is valid */
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output_struct->data.dma.number_of_channels = i;
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if (i > 0) {
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/* Calculate the structure size based upon the number of interrupts */
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struct_size += ((acpi_size) i - 1) * 4;
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}
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/* Point to Byte 2 */
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buffer += 1;
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temp8 = *buffer;
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/* Check for transfer preference (Bits[1:0]) */
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output_struct->data.dma.transfer = temp8 & 0x03;
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if (0x03 == output_struct->data.dma.transfer) {
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
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"Invalid DMA.Transfer preference (3)\n"));
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return_ACPI_STATUS(AE_BAD_DATA);
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}
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/* Get bus master preference (Bit[2]) */
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output_struct->data.dma.bus_master = (temp8 >> 2) & 0x01;
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/* Get channel speed support (Bits[6:5]) */
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output_struct->data.dma.type = (temp8 >> 5) & 0x03;
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/* Set the Length parameter */
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output_struct->length = (u32) struct_size;
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/* Return the final size of the structure */
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*structure_size = struct_size;
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return_ACPI_STATUS(AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_rs_dma_stream
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*
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* PARAMETERS: linked_list - Pointer to the resource linked list
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* output_buffer - Pointer to the user's return buffer
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* bytes_consumed - Pointer to where the number of bytes
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* used in the output_buffer is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Take the linked list resource structure and fills in the
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* the appropriate bytes in a byte stream
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*
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******************************************************************************/
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acpi_status
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acpi_rs_dma_stream(struct acpi_resource *linked_list,
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u8 ** output_buffer, acpi_size * bytes_consumed)
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{
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u8 *buffer = *output_buffer;
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u16 temp16 = 0;
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u8 temp8 = 0;
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u8 index;
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ACPI_FUNCTION_TRACE("rs_dma_stream");
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/* The descriptor field is static */
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*buffer = 0x2A;
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buffer += 1;
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temp8 = 0;
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/* Loop through all of the Channels and set the mask bits */
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for (index = 0;
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index < linked_list->data.dma.number_of_channels; index++) {
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temp16 = (u16) linked_list->data.dma.channels[index];
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temp8 |= 0x1 << temp16;
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}
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*buffer = temp8;
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buffer += 1;
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/* Set the DMA Info */
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temp8 = (u8) ((linked_list->data.dma.type & 0x03) << 5);
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temp8 |= ((linked_list->data.dma.bus_master & 0x01) << 2);
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temp8 |= (linked_list->data.dma.transfer & 0x03);
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*buffer = temp8;
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buffer += 1;
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/* Return the number of bytes consumed in this operation */
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*bytes_consumed = ACPI_PTR_DIFF(buffer, *output_buffer);
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return_ACPI_STATUS(AE_OK);
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}
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